Post a link to the datasheet for your motor.Have a look at stepper motor basics. It may answer your questions....R
I find it hard to understand how you are thinking of using an L298 if you had read stepper motor basics. Use a Pololu DRV8825 stepper driver. The Pololu A4988 and the BigEasydriver would be struggling with a 2 amp motor and the DRV8825 has a little more headroom.The title of your Thread is also rather irrelevant to your problem....R
Stepstick-style drivers like the Pololu DRV8825 drivers are extremely common in generic versions. If you can tell us what side of the planet you're on someone might be able to point out a local shipper. You might start out by just searching for the keywords DRV8825 or A4988 to find sellers in your area.
What are you trying to do with this motor? If you only need slow rotation you shouldhave bought a high-impedance unipolar stepper and driven with a ULN2803, much simpler.If you want high performance from a stepper you just will not get it with H-bridge driver,you _need_ a current-controlling chopper driver for that application.
A high impedance stepper of same torque will take 12V and about 0.4A, and you candouble-up ULN2803 channels anyway as it has 8 and you only need 4 for a motor.